MySQL安装与使用（8）- 修改数据库字符集

修改数据库字符集:

ALTER DATABASE db_name DEFAULT CHARACTER SET character_name [COLLATE ...]; 

把表默认的字符集和所有字符列（CHAR,VARCHAR,TEXT）改为新的字符集：

ALTER TABLE tbl_name CONVERT TO CHARACTER SET character_name [COLLATE ...]  
-- 示例
ALTER TABLE user CONVERT TO CHARACTER SET utf8 COLLATE utf8_general_ci;  

只是修改表的默认字符集:

ALTER TABLE tbl_name DEFAULT CHARACTER SET character_name [COLLATE...];  
-- 示例
ALTER TABLE user DEFAULT CHARACTER SET utf8 COLLATE utf8_general_ci;   

修改字段的字符集：

ALTER TABLE tbl_name CHANGE c_name c_name CHARACTER SET character_name [COLLATE ...]; 
-- 示例
ALTER TABLE user CHANGE username username VARCHAR(100) CHARACTER SET utf8 COLLATE utf8_general_ci;  

查看数据库编码

SHOW CREATE DATABASE db_name;   

查看表编码

SHOW CREATE TABLE tbl_name;  

查看字段编码

SHOW FULL COLUMNS FROM tbl_name;